DE112018003780B4 - DEVICE COMPRISING DISINFECTING LIGHT SOURCES AND METHOD FOR OPERATING A LAMP WITH DISINFECTING LIGHT SOURCES - Google Patents

Abstract

Apparatus comprising:a first disinfecting light source (110); a beam angle adjuster (114) that controls a beam angle of the first light source and indicates the beam angle; anda second non-disinfecting light source (112), a distance sensor (106) indicating a distance from the first light source (110) to a target surface irradiated by the first light source (110); anda processor (102) that calculates and adjusts an emission of the first light source (110) based on the beam angle specified by the beam angle adjuster (114) and the distance from the first light source (110) to the target surface specified by the distance sensor (106) in order to achieve a to achieve a predetermined irradiance of the target surface, the device further comprising a motion sensor (104), the device being designed to: - if no movement is detected by the motion sensor (104), to set the first light source (110) to an ON state and set the second light source (112) to an OFF state, and - if movement is detected by the motion sensor (104) and a beam section is not detected by the distance sensor (106), the first light source (110) to a DIMM state (the is smaller than a maximum radiation, but is not the OFF state), and the second light source (112) is set to the ON state, and - when a movement is detected by the motion sensor (104) and a beam cut by the distance sensor (106 ) is detected, setting the first light source (110) to the OFF state and setting the second light source (112) to the ON state.

Description

CROSS REFERENCE TO RELATED APPLICATION

The present application is an international application and claims priority to U.S. Patent Application No. filed July 24, 2017. 15/657,340 entitled “UV-DOWNLIGHT WITH INTELLIGENT IRRADIANCE CONTROL”, which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The subject matter of this disclosure generally relates to solid-state lights and, in particular, lights for disinfecting target surfaces by neutralizing pathogens.

BACKGROUND

From the US 2013 / 0 330 235 A1 Systems for determining operating parameters and disinfection schedules for germicidal devices and germicidal lamp devices including lens systems are known.

The WO 2017/020 028 A1 refers to portable UV devices and their use in procedures for sterilizing and disinfecting an interior surface in a container or defined environment.

In addition, be on the US 2007 / 0 086 912 A1 pointed out, which relates to ultraviolet light emitting diode systems and methods for generating ultraviolet light.

Mobile disinfection lights are used to flood spaces such as hospital rooms with UV-B (UV light of 280-315 nanometers (nm)) and UV-C (UV light of 200-280 nm) radiation for disinfection purposes. Such mobile disinfection lights require a relatively short time, e.g. several minutes, to achieve sufficient disinfection, but it is necessary to evacuate the room of people. Another type of disinfection light uses a fixed 405nm violet light source to ensure disinfection without evacuating people from the room. However, such lights can take hours to achieve adequate disinfection because their light is less effective at killing pathogens than UV-B and UV-C radiation and is spread over a large area so irradiance levels are relatively low .

SUMMARY

All examples, aspects and features mentioned in this document may be combined in any technically possible way.

The embodiments falling within the scope of the claims are deemed to be embodiments of the invention. All other embodiments are considered merely as examples useful for understanding the invention.

Various implementations described herein include a device having a first light source, a beam angle adjuster that controls a beam angle of the first light source and indicates the beam angle, a distance sensor that indicates a distance from the first light source to a target surface irradiated by the first light source and a processor that calculates and adjusts an irradiance of the first light source based on the beam angle indicated by the beam angle adjuster and the distance from the first light source to the target surface indicated by the distance sensor to a predetermined irradiance of the target surface to reach.

In some embodiments, the luminaire further includes a motion sensor indicative of detected motion in a volume of space that is larger than a volume of space into which the first light source emits light, and the processor responds to an indication of motion from the motion sensor to initiate the emission to partially reduce the first light source. In some embodiments, the processor responds to detecting a change in distance sensed by the distance sensor to zero the emission of the first light source. In some embodiments, the luminaire further includes a power supply, and the processor controls the power supply to adjust the output of the light source. In some embodiments, the first light source is a disinfectant light source that includes a plurality of light-emitting diodes (LEDs) that emit at least one of: UV-C radiation (100 nm - 280 nm); UV-B radiation (280 nm - 315 nm); UV-A radiation (315 nm - 400 nm); violet light and blue light. In some embodiments, the luminaire further includes a power supply, and the processor controls the power supply to selectively energize and disconnect individual LEDs in the plurality of LEDs of the disinfecting light source. In some embodiments, the light includes a second light source that includes a plurality of LEDs that emit white light. In some embodiments, the lamp includes fer ner a motion sensor that indicates detected motion in a volume of space that is larger than a volume of space into which the first light source emits light, and the processor responds to an indication of motion from the motion sensor to partially reduce the emission of the first light source and changing the emission of the second light source from an OFF state to an ON state.

Various implementations described herein include a method of operating a light that includes a first light source, a beam angle adjuster, a distance sensor, and a processor. The method includes controlling a beam angle of the first light source by means of the beam angle adjuster and specifying the beam angle, specifying by means of the distance sensor a distance from the first light source to a target surface irradiated by the first light source, and calculating and adjusting by means of the processor an emission from the first light source based on the beam angle specified by the beam angle adjuster and the distance of the first light source to the target surface specified by the distance sensor to achieve a predetermined irradiance of the target surface.

In some embodiments, the luminaire further comprises a motion sensor and the method further comprises indicating, by means of the motion sensor, detected motion in a volume of space that is larger than a volume of space into which the first light source emits light, and partially reducing the emission of the first light source by means of the processor in response to the detected movement from the motion sensor. In some embodiments, the method further includes zeroing the emission of the first light source by means of the processor in response to detecting a change in distance detected by the distance sensor. In some embodiments, the luminaire further includes a power supply and the method further includes controlling the power supply via the processor to adjust the emission of the first light source. In some embodiments, the first light source includes a plurality of light-emitting diodes (LEDs) that emit at least one of: UV-C radiation (100 nm - 280 nm); UV-B radiation (280 nm - 315 nm); UV-A radiation (315 nm - 400 nm); violet light and blue light. In some embodiments, the luminaire further includes a power supply, and the method further includes controlling the power supply via the processor to selectively power and turn off individual LEDs of the plurality of LEDs. In some embodiments, the luminaire further includes a second light source that includes a plurality of LEDs that emit white light in the ON state. In some embodiments, the luminaire further comprises a motion sensor and the method further comprises indicating, by means of the motion sensor, a detected movement in a volume of space that is larger than a volume of space into which the first light source emits light, and partially reducing the emission by means of the processor the first light source and changing the emission of the second light source from an OFF state to an ON state in response to the detected motion from the motion sensor.

Various implementations described herein include a device that includes a first light source that emits disinfectant light, a second light source that emits white light, a beam angle adjuster that controls a beam angle of the first light source and indicates the beam angle, a distance sensor that determines a distance from the first light source to a target surface that is irradiated by the first light source, and a processor that irradiates the first light source based on the beam angle specified by the beam angle adjuster and the distance from the first light source to the target surface specified by the distance sensor , calculated and adjusted to achieve a specified irradiance on the target surface.

In some embodiments, the device further includes a motion sensor that indicates detected motion in a volume of space that is larger than a volume of space into which the first light source emits light, and in the absence of detected motion, the processor sets the first light source to an ON state. state and the second light source into an OFF state. In some embodiments, the processor responds to an indication of motion from the motion sensor by partially reducing the emission of the first light source and changing the second light source from an OFF state to an ON state. In some embodiments, the processor responds to detecting a change in distance sensed by the distance sensor to place the first light source in an OFF state.

BRIEF DESCRIPTION OF THE FIGURES

• 1 is a block diagram of a luminaire with irradiance control according to various embodiments.
• 2 illustrates a method of irradiance control for the luminaire of 1 according to various embodiments.
• 3 and 4 illustrate an implementation of built-in lighting of the luminaire 1 according to various embodiments.
• 5 and 6 illustrate a track lighting implementation of the luminaire from 1 with a movable lens according to various embodiments.
• 7 illustrates a track lighting implementation of the luminaire from 1 with a deformable lens according to various embodiments.
• 8th and 9 illustrate a track lighting implementation of the luminaire from 1 , in which the beam angle adjuster is implemented by rotating an array of lenses with respect to a fixed array or matrix of LEDs (light-emitting diodes), according to various embodiments.

These and other features will be better understood by reading the following detailed description along with the figures described herein. The attached figures are not intended to be drawn to scale. Any identical or nearly identical component shown in different figures may be represented by the same reference numeral. For reasons of clarity, not every component may be marked in every illustration.

DETAILED DESCRIPTION

Some aspects, features and implementations described herein may include machines such as computers, electronic components, optical components and computer-implemented processes. It will be apparent to those of ordinary skill in the art that the computer-implemented processes may be stored as computer-executable instructions on a non-transitory computer-readable medium. Furthermore, it will be appreciated by those of ordinary skill in the art that the computer-executable instructions may be executed on a variety of tangible processing devices. For ease of illustration, not every device or component that may be part of a computer or data storage system is described here. Those of ordinary skill in the art will recognize such devices and components in light of the teachings of the present disclosure and knowledge generally available to those of ordinary skill in the art. The corresponding machines and processes are therefore made possible and fall within the scope of the disclosure.

1 is a block diagram of a luminaire 100 with irradiance control according to various embodiments. In some implementations, the light 100 may be implemented as a type of downlight for disinfecting a target surface. The light 100 may include a processor 102, a motion sensor 104, a distance (proximity) sensor 106, a power supply 108, a disinfecting light source 110, a non-disinfecting light source 112, and a beam angle adjuster 114. The processor 102 may be a general purpose processor, a special purpose processor, such as an ASIC (Application Specific Integrated Circuit) or a FPGA (Field Programmable Gate Array), or combinations thereof, by way of example and not limitation, each of which may include non-volatile computer-readable memory. The motion sensor 104 may include, by way of example and not limitation, PIR (passive infrared) sensors, MW (microwave) sensors, ultrasonic sensors, vibration sensors, and combinations thereof. The distance sensor 106 may include, by way of example and not limitation, an ultrasonic time-of-flight sensor, an optical time-of-flight sensor, IR (infrared) sensors using IR triangulation. The disinfecting light source 110 may include LEDs that emit light in a variety of wavelengths in bands including, but not limited to, UV-C (100 nm - 280 nm), UV-B (280 nm - 315 nm), UV-A (315 nm - 400 nm), violet light and blue light, for example but not limiting, 200 nm, 254 nm, 265 nm, 280 nm, 311 nm, 365 nm and 405 nm, by way of example and not limitation. 265 nm is the peak of the germicidal effectiveness curve and may be the optimal wavelength for killing viruses and bacteria from UV-C. 365 nm can be used to disinfect with a chemical called a photosensitizer, such as riboflavin (vitamin B2), to kill bacteria and viruses. The non-disinfecting light source 112 may emit white light, by way of example and not limitation. The beam angle adjuster 114 may include, by way of example and not limitation, a lens that refracts the light emitted from the disinfecting light source 110 and optionally the non-disinfecting light source 112, may include a movable parabolic or elliptical reflector, may include a rotating array of lenses ( Lenslets) may include - but is not limited to - an electro-optical device comprising an electronically deformable lens or a MEMS-based DMD (microelectromechanical system based digital micromirror) reflector, wherein LEDs of a matrix or array are selectively powered be supplied and de-energized or another suitable technology. The beam angle adjuster 114 can be operated manually, electronically or mechanically.

The processor 102 may respond to inputs from the distance sensor 106 and the beam angle adjuster 114 to calculate and adjust the radiation level of the disinfecting light source 110 to achieve a predetermined irradiance of a target surface. This can - by way of example and not limitation - be achieved by the processor controlling the power supply 108 to adjust the emission of the LEDs of the disinfecting light source 110 and optionally the non-disinfecting light source 112, or by the processor 102 selectively controlling individual LEDs of the disinfecting Light source 110 and possibly the non-disinfecting light source 112 are supplied with energy or switched off via the power supply 108. Further, the processor 102 may respond to inputs from the motion sensor 104 and the distance sensor 106 to change the ON/OFF/DIMM state of the disinfecting light source 110 and the non-disinfecting light source 112. In general, the motion sensor 104 detects motion in a larger volume of space than is irradiated by the disinfecting light source 110, as controlled by the beam angle adjusters 114. Consequently, the presence of a person in an area near the emitted disinfectant light can be detected before the person is irradiated with the disinfectant light. In general, the distance sensor 106 detects objects in a volume of space that is irradiated by the disinfecting light source. Consequently, the presence of a person being irradiated with the disinfecting light can be detected by the distance sensor 106, for example by means of a beam section indicated by a change in the detected distance.

2 illustrates a method of irradiance control for the luminaire of 1 according to various embodiments. The method may be performed by one or more components in the luminaire 100, as in 1 is shown, for example the processor 102, the beam angle adjuster 114, the motion sensor 104 and the distance sensor 106. The lamp is aligned with the target surface to be treated, as indicated in block 200. By way of example and not limitation, the disinfecting light source (in 2 referred to as “Source 1”) can be directed manually, electronically or mechanically directly onto a surface to be disinfected. The area of incidence of the disinfecting light source is adjusted as indicated in block 202 using the beam angle adjuster. By way of example and not limitation, the incidence range can be adjusted to roughly coincide with the area of the surface to be disinfected by adjusting the beam angle of the disinfecting light source with the beam angle adjuster. The emitted disinfectant light may pass through a volume of space having a conical, cylindrical or other shape whose cross section does not necessarily coincide with the target surface, so that the emitted disinfectant light does not necessarily correspond exactly with the target surface. The distance from the light to the target surface is measured with the distance sensor as indicated in block 204. The distance to the target surface and the beam angle can be used to calculate and adjust the radiation of the disinfecting light source, as indicated in block 206. For example, the radiation can be adjusted to achieve a predetermined W/m ² irradiance on the target surface. At this point, the light can be considered ready for use to disinfect the target surface.

If no motion is detected by the motion sensor during operation, as indicated in block 208, the disinfecting light source is set to ON (maximum emission) and the non-disinfecting light source (in 2 referred to as “Source 2”) is set to OFF (no broadcast) as indicated in block 210. If motion is detected, as indicated in block 208, and a beam section (e.g., a person entering the area of the disinfecting beam) is not detected by the distance sensor, as indicated in block 212, the disinfecting light source is set to DIMM (less than maximum radiance but not OFF) and the non-disinfecting light source is set to ON as indicated in block 214. When motion is detected, as indicated in block 208, and a beam cut is detected, as indicated in block 212, the disinfecting light source is set to OFF and the disinfecting light source is set to ON, as indicated in block 216. An override input, as indicated in block 218, may be used to turn ON both the disinfecting light source and the non-disinfecting light source, as indicated in block 220, or to set both the disinfecting light source and the non-disinfecting light source to OFF as indicated in block 222. In some embodiments, the processor may also selectively turn on and off individual LEDs of the disinfecting light source and optionally the non-disinfecting light source based on inputs from the motion sensor and/or the distance sensor.

Although there are not necessarily specific advantages associated with implementations, adjusting the incidence range of the disinfectant light source by changing the beam angle can provide greater irradiance to the target surface surface area for a given light source irradiance and can therefore achieve adequate disinfection more quickly relative to fixed beam luminaires that diffuse the light over an area larger than the target surface. Additionally, setting an irradiance value based on distance and beam angle can provide a predetermined irradiance of the target surface and thus a more predictable disinfection time. Adjusting the emission of disinfectant light based on movement and beam section can help prevent unwanted irradiation of people. For example, the disinfectant light may be dimmed when a person is nearby but not in the direct path of the disinfectant light, and the disinfectant light may be turned off when a person is in the direct path of the disinfectant light. In some implementations, UV-C or violet light may be used to provide faster disinfection than current state-of-the-art luminaires without the need to evacuate the nearby area of people. However, none of the advantages described above should be considered limiting.

3 and 4 illustrate a recessed lighting implementation of the luminaire 1 according to various embodiments. The illustrated light 300 includes a matrix of LEDs 302 in a housing 304 that is pivotable and rotates relative to a flange 306 connected to a flat panel 308. The flat panel 308 may be sized to replace a standard suspended ceiling panel, although this should not be considered limiting. The housing 304 and thus the LED matrix can be rotatable 360 degrees and pivotable through a certain angle, for example and not limiting +/- 20 degrees, relative to an axis 310 that is perpendicular to the panel. In the specific example illustrated, the LED matrix includes a first (outer) ring 312 of disinfectant light source LEDs 314 and a second (inner) ring 316 of non-disinfectant light source LEDs 318. A motion sensor 320 and a distance sensor 322 may be activated by the Panel mounted or installed in the housing or in the LED matrix. The light 300 can be aligned with the target surface by rotating and pivoting the housing to align the matrix of LEDs 302 with the target surface. The incident range of the emitted light can be adjusted by changing the beam angle with a lens 324 disposed between the LEDs and the target surface, for example and not limited to the housing 304 in which the LED matrix is disposed. The distance sensor 322 can be used both to measure the distance to the target surface and to detect a beam section, for example by a person, based on a change in the measured distance.

5 and 6 illustrate a track lighting implementation of the luminaire from 1 with a movable lens according to various embodiments. The illustrated light 500 includes a matrix 502 of LEDs 504 in a housing 506 that pivots and rotates relative to a rail mount 508. The housing 506 and thus the LED matrix can be rotatable through 360 degrees and pivotable through a certain angle, for example and not limiting +/- 90 degrees relative to an axis 510 which is perpendicular to the ceiling. A motion sensor 512 and a distance sensor 514 can be installed in the housing 506 or in the LED matrix 502. The light 500 can be aligned with the target surface by rotating and pivoting the housing 506 to align the matrix of LEDs with the target surface. The incident range of the emitted light can be adjusted with a movable lens 516 disposed between the LEDs and the target surface, for example and not limitation, on the disposed lens mount 518 coupled to the housing 506. The distance between the lens 516 and the LEDs 504 can be adjusted by moving the lens holder 518 relative to the housing 506 along the axis 520. The distance sensor can be used both to measure the distance to the target surface and to detect a beam section, for example by a person, based on a change in the measured distance.

7 illustrates a track lighting implementation of the luminaire from 1 with a deformable lens according to various embodiments. The illustrated light 700 includes a matrix 702 of LEDs 704 in a housing 706 that pivots and rotates relative to a track mount. The housing 706 and thus the LED matrix can be rotatable 360 degrees and pivotable through a certain angle, for example and not limiting +/- 90 degrees relative to an axis that is perpendicular to the ceiling. A motion sensor 712 and a distance sensor 714 can be built into the housing 706 or the LED matrix 702. The light can be aligned with the target surface by rotating and pivoting the housing 706 to align the matrix of LEDs with the target surface. The incident range of the emitted light can be adjusted with a deformable lens 716 placed between the LEDs and the target surface is arranged, for example and not limitingly, at a distal end of the housing 706. The shape of the deformable lens 716 can be adjusted, for example and not limitingly, on an axis 720. The distance sensor 714 can be used both to measure the distance to the target surface and to detect a beam section, for example by a person, based on a change in the measured distance become.

8th and 9 illustrate a track lighting implementation of the luminaire from 1 , in which the beam angle adjuster is implemented by rotating an array of lenses 801 on a base 803 with respect to a fixed array or matrix of LEDs 802. When the lenslets 801 and the LEDs 802 are aligned, the emitted light beams are parallel. Diverging light beams are emitted when the lenslets 801 and the LEDs 802 are not aligned. The illustrated light 800 includes a matrix of LEDs 802 in a housing 806 that pivots and rotates relative to a rail mount 808. The housing 806 and thus the LED matrix can be rotatable through 360 degrees and pivotable through a certain angle, for example and not limiting +/- 90 degrees relative to an axis 810 which is perpendicular to the ceiling. A motion sensor 812 and a distance sensor 814 can be built into the housing 806 or the LED matrix 802. The light 800 can be aligned with the target surface by rotating and pivoting the housing 806 to align the matrix of LEDs 802 with the target surface. The distance sensor 814 can be used both to measure the distance to the target surface and to detect a beam section, for example by a person, based on a change in the measured distance.

Throughout this disclosure, it can be assumed that the use of the articles "a" and/or "an" and/or "the" to modify a noun is used for convenience and an or multiple is encompassed by this modified noun unless otherwise stated. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that there may be additional items other than those listed.

Elements, components, modules and/or parts thereof described in the figures and/or otherwise depicted as communicating with, relating to and/or relying on something else may be understood to be that it communicates, relates to and/or is based on it in a direct and/or indirect manner, unless otherwise specified herein.

A number of features, aspects, embodiments and implementations have been described. It should be understood, however, that a variety of modifications and combinations may be made without departing from the scope of the inventive concepts described herein. Accordingly, these modifications and combinations are within the scope of the following claims.

Claims (17)

Device comprising: a first disinfecting light source (110); a beam angle adjuster (114) that controls a beam angle of the first light source and indicates the beam angle; and a second non-disinfecting light source (112), a distance sensor (106) indicating a distance from the first light source (110) to a target surface irradiated by the first light source (110); and a processor (102) which calculates and adjusts an emission of the first light source (110) based on the beam angle specified by the beam angle adjuster (114) and the distance from the first light source (110) to the target surface specified by the distance sensor (106). to achieve a predetermined irradiance of the target surface, the device further comprising a motion sensor (104), the device being designed to: - if no movement is detected by the motion sensor (104), set the first light source (110) to an ON state and set the second light source (112) to an OFF state, and - If a movement is detected by the motion sensor (104) and a beam section is not detected by the distance sensor (106), the first light source (110) switches to a DIMM state (which is smaller than a maximum radiation, but is not the OFF state ), and set the second light source (112) to the ON state, and - if a movement is detected by the motion sensor (104) and a beam cut is detected by the distance sensor (106), set the first light source (110) to the OFF state and set the second light source (112) to the ON state. Device according to Claim 1 , wherein the motion sensor (104) indicates detected movement in a volume of space that is larger than a volume of space into which the first light source (110) emits light, and wherein the processor (102). an indication of a movement from the motion sensor (104) responds to partially reduce the emission of the first light source (110). Device according to Claim 1 , wherein the processor (102) responds to the detection of a change in the distance detected by the distance sensor (106) in order to set the emission of the first light source (110) to zero. Device according to Claim 1 , further comprising a power supply (108), and wherein the processor (102) controls the power supply (108) to adjust the emission of the light source. Device according to Claim 1 , wherein the first light source (110) comprises a plurality of light-emitting diodes (LEDs) that emit at least one of the following rays: UV-C radiation (100 nm - 280 nm); UV-B radiation (280 nm - 315 nm); UV-A radiation (315 nm - 400 nm); violet light and blue light. Device according to Claim 5 , further with a power supply (108), the processor (102) controlling the power supply (108) to selectively turn on and off individual LEDs of the plurality of LEDs of the disinfecting light source (110) with power. Device according to Claim 1 , wherein the second light source (112) comprises a plurality of LEDs that emit white light. Device according to Claim 7 , wherein the motion sensor (104) indicates a detected movement in a volume of space that is larger than a volume of space into which the first light source emits light (110), and wherein the processor (102) responds to an indication of a movement from the motion sensor (104). responds to partially reduce emission of the first light source (110) and change the emission of the second light source (112) from an OFF state to an ON state. Method for operating a lamp with a first disinfecting light source (110) and a second non-disinfecting light source (112), a beam angle adjuster (114), a distance sensor, a motion sensor (104) and a processor (102), the method comprising: controlling a beam angle of the first light source (110) and specifying the beam angle using the beam angle adjuster (114); specifying a distance from the first light source (110) to a target surface irradiated by the first light source (110) using the distance sensor (106); and Calculate and adjust, by means of the processor (102), an emission of the first light source (110) based on the beam angle specified by the beam angle adjuster (114) and the distance from the first light source (110) to the target surface specified by the distance sensor (106). to achieve a predetermined irradiance of the target surface, the method further comprising the following steps: - if no movement is detected (208), setting the first light source (110) to an ON state and the second light source (112) to an OFF state (210), and - if movement is detected (208) and a beam section is not detected (212), setting the first light source (110) to a DIMM state (which is less than a maximum emission but is not the OFF state) and the second light source (112) to the ON state (214), and - when movement is detected (208) and a beam cut is detected (212), setting the first light source (110) to the OFF state and the second light source (112) to the ON state (216). Procedure according to Claim 9 , the method further comprising: indicating a detected movement by means of the motion sensor (104) in a volume of space that is larger than a volume of space into which the first light source (110) emits light; and partially reducing, by means of the processor, the emission of the first light source (110) in response to the detected motion from the motion sensor (104). Procedure according to Claim 9 , the method further comprising: zeroing the emission of the first light source (110) by means of the processor (102) in response to detecting a change in distance detected by the distance sensor (106). Procedure according to Claim 9 , wherein the lamp further comprises a power supply and the method further comprises: controlling the power supply (108) by means of the processor to adjust the emission of the first light source (110). Procedure according to Claim 9 , wherein the first light source (110) comprises a plurality of light-emitting diodes (LEDs) that emit at least one of: UV-C radiation (100 nm - 280 nm); UV-B radiation (280 nm - 315 nm); UV-A radiation (315 nm - 400 nm); violet light and blue light. Procedure according to Claim 13 , wherein the lamp further comprises a power supply (108) and the method further comprises: controlling the power supply (108) by means of the processor (102) to selectively turn on and off individual LEDs of the plurality of LEDs. Procedure according to Claim 9 , wherein the lamp further comprises a second light source (112) which has a plurality of LEDs which emit white light when switched on. Procedure according to Claim 15 , wherein the lamp further comprises a motion sensor (104) and the method further comprises: indicating a detected movement by means of the motion sensor (104) in a volume of space that is larger than a volume of space into which the first light source (110) emits light; and partially reducing the emission of the first light source (110) and changing the emission of the second light source (112) from an OFF state to an ON state in response to the detected motion from the motion sensor (104) by means of the processor (102). Device comprising: a first light source (110) that emits disinfecting light; a second light source (112) that emits white light, a beam angle adjuster (114) that controls a beam angle of the first light source (110) and indicates the beam angle; a distance sensor (106) indicating a distance from the first light source (110) to a target surface irradiated by the first light source (110); and a processor (102) which calculates and sets an emission from the first light source (110) based on the beam angle specified by the beam angle adjuster (114) and the distance from the first light source (110) to the target surface specified by the distance sensor (106), to achieve a predetermined irradiance of the target surface, further comprising a motion sensor (104) which indicates a detected movement in a volume of space that is larger than a volume of space into which the first light source emits light, and wherein the processor (102) in the absence of a detected movement, the first light source (110) in an ON state and the second light source in an OFF state, wherein the processor (102) responds to an indication of motion from the motion sensor (104) by partially reducing the emission of the first light source (110) and the emission of the second light source (112) from an OFF state to an ON state changes, wherein the processor (102) responds to detection of a change in distance detected by the distance sensor to place the first light source (110) in an OFF state.

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